/* 整体页面背景 */
body {
    margin: 0;
    padding: 0;
    font-family: 'Arial', sans-serif;
    background: linear-gradient(135deg, #181c2b 0%, #232946 100%);
    min-height: 100vh;
    color: #f3f6fa;
    display: flex;
    justify-content: center;
    align-items: center;
}

.main-content, .welcome-container {
    max-width: 600px;
    margin: 80px auto;
    padding: 40px 40px 32px 40px;
    background: rgba(30,34,54,0.95);
    border-radius: 18px;
    box-shadow: 0 8px 32px #1e90ff22;
    text-align: center;
}

/* 欢迎标题样式 */
.welcome-title {
    font-size: 28px;
    color: #1e90ff;
    margin-bottom: 20px;
    font-weight: bold;
    letter-spacing: 2px;
    text-shadow: 0 2px 8px #1e90ff44;
    animation: fadeInDown 1s;
}

/* 登录时间样式 */
.login-time {
    font-size: 18px;
    color: #b0b3c6;
    margin-bottom: 30px;
}

/* 系统描述样式 */
.system-desc {
    color: #b0b3c6;
}

/* 链接按钮样式 */
.link-btn {
    display: inline-block;
    padding: 12px 24px;
    margin: 5px;
    font-size: 18px;
    color: #fff;
    background-color: #007bff;
    text-decoration: none;
    border-radius: 8px;
    transition: background-color 0.3s ease;
}

.link-btn:hover {
    background-color: #0056b3;
}

/* 添加一些间距 */
.link-btn + .link-btn {
    margin-left: 10px;
}

.action-buttons a, .btn {
    margin: 0 12px;
    min-width: 120px;
    background: #232946;
    color: #fff;
    border: 1px solid #1e90ff;
    border-radius: 8px;
    transition: background 0.2s, box-shadow 0.2s, color 0.2s, transform 0.2s;
}

.action-buttons a:hover, .btn:hover {
    background: #1e90ff;
    color: #fff;
    box-shadow: 0 0 12px #1e90ff88, 0 0 2px #fff;
    transform: scale(1.08);
}

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-30px); }
    to { opacity: 1; transform: translateY(0); }
}